Closure element



FIG. 1 is a top and side perspective view of a closure element showing my new design;

FIG. 2 is a side elevational view thereof, the side opposite that shown in FIG. 2 being identical thereto;

FIG. 3 is a view similar to FIG. 2 but rotated 90° about a vertical axis, the side opposite that shown in FIG. 3 being identical thereto;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a closure element, as shown and described. 